Fix a bug of follows_follower_id_accounts_id_fk

Fix #112

Author: dahlia

CHANGES.md

@@ -6,11 +6,16 @@ Version 0.4.8
 
 To be released.
 
+ -  Fixed a bug where the `follows.follower_id` column had not referenced the
+    `accounts.id` column.  [[#112]]
+
  -  Fixed a bug where the federation dashboard had not shown due to server
     errors when an instance had just been set up.
 
  -  Upgrade Fedify to 1.3.9.
 
+[#112]: https://github.com/fedify-dev/hollo/issues/112
+
 
 Version 0.4.7
 -------------

drizzle/0062_follows_follower_id_accounts_id_fk.sql

@@ -0,0 +1,5 @@
+ALTER TABLE "follows" DROP CONSTRAINT "follows_follower_id_accounts_id_fk";
+--> statement-breakpoint
+DELETE FROM "follows" WHERE "follower_id" NOT IN (SELECT "id" FROM "accounts");
+--> statement-breakpoint
+ALTER TABLE "follows" ADD CONSTRAINT "follows_follower_id_accounts_id_fk" FOREIGN KEY ("follower_id") REFERENCES "public"."accounts"("id") ON DELETE cascade ON UPDATE no action;